Improvement in lock-up safety-valves



gleiten ftatr- @anni @ffice DANIEL Gr, COPPlN AND `GrlLBER-'l H. CLEM'ENS, 0F CINCINNATI, OHIO.

I Leiters Patent No. 62,476, dated February 26, 1867.

IMPROVEMENT IN LOCK-UP .SAFETY-VALVES.

TO ALL WIIOM IT MAY CONCERN:

Be it known that we, DANIEL G. CorrIN and GILBERT H. CLnnnNs, of Cincinnati, Hamilton count-y, State ot' Ohio, have invented certain new and useful improvements in Steam Safety-Valves; and we do hereby declare the following to bc a full, clear, and exact description thereof, reference being had to the ings, making part of this specification. l

Figure I is a sectional view of our improved steam .safety-valve, showing the working parts,`which are unlike the valve accompanying this one as regards the enclosure of the valve-stem. The working parts are also entirely free from the exhaust steam, which isrdischarged directly from the valve through the openings in the body of case., and not through the enclosure of the working parts, as docs the other valve. I

Figure 2 is a plan of caso with cap removed, showing the relative positions of the Working parts above the weight, while a portion of the-weight is broken away, exposing a portion of the valve-stem guide flange, and how it is securedl to the body of case by means of the set-screws, as shown.

Figure 3 is an end view of the lover, saddle, and attachment, and how secured to the Weight, a portion of which is represented.

Figure 4 is an end view of the valve-stem in part, graduating arm, standards formingfulcra for levers, steel point, and portion of case.

Figure 5 is an inverted view of bottom of valve, showing the receiving and discharging openings, also valve, valve-stem, and guide for same.

accompanying draw- A represents the body of case in form, as shown, provided at its periphery of top with a continuous raised lip to form base for the enclosing cap B. In thecentre is a steam chamber, A', which is closed at the top by the valve-guide flange J after the valve-seat and valve have been placed -in position.. The steam chamber A is encircled by another steam chamber, A, which are connected by the openings a. A, circular enclosure projects downwards from the bottom of flange, which forms a guard for the valve-seat, and is provided with openings a to admit the steam to valve. The escape steam from the valve passes into chamber A', then to chamber A, and out into the air, as the arrows indicate. A small spindle is provided, as shown, having upon one end an eccentric, Z, and upon the other end an armut", for the purpose of raising the valve when desired. A lip, 1t, as shown, projects to receive the hook-lug N on cap. Bk represents the cap in form7 as shown', provided at the bottom with a 'ilange projecting outward, and formed to lit the body1 of case, while upon the inside a hook-lug occurs to receive the lip n, on body of case, opposite to which a lug is provided to receive the loclc-bolt M, which secures the cap B to body A.. C represents the parallel levers, hinged to thc standards E, whic'n are secured at their hase by sct-screws e to the top face of case D represents the graduating arms with a hub at centre, and fitted to the top of valve-stem H, and pro-l vided with elongated parallel slots d" to allow the relative movement of the steel points nl to any position desired to weigh all variable pressures of steam. E represent the standards forming fulcra for' levers C; F represents the weight suspended from thc levers C by the saddle I, pivoted to lug G, secured te the top of the Weight, as shown. G represents the lugs with screw-pins attached, firmly secured to the tcp cf weight at equal distances from centre, as shown. l-I represents the valve with stem above, to which are secured at the top the graduating arms D,wl1ile below is a stem to guide the valve to its-seat. A collar, L, encircles' the valve-stern, which is employed in connection with the eccentric-spindle L to assist in raising thc valve, also to cut oil any communication of the escape steam with the enclosing cap by the inclines of top of collar and bottom of' tube coming in Contact with cach other when the valve rises from its seat, thereby regulating the lift of valve. I represents a ila-nge with tuheon top, which forms a guide for top of valvestem H, also to close the top' of chamber secured to the case by lset-screws j. J' represents the valvescat and stem-guide K combined, secured to case, as shown. K represents a spindle, with an eccentric, Z, en one end and arm Z on the other end, also a' loose collar to secure the spindle in position.

M represents the hook-lug on cap, and how attached to the lip on case.

Its Operation.. l, The valve, being seated and at rest, the steam, as itrises, is admitted through the openings a under the valve. When the pressure ofsteam becomes equal to the resistance oered by the Weight suspended from the levers the'volve will rise from its sont and relieve the boiler of any excess of steam over the maximum allowed. When the valve is raised from its soot the escape steam blows into the chamber A through the openings a', into the chamber A, und out through the openings a into the oir,` as indicated by the arrows repre; sented in fig. 5, as shown.

Vire claim herein os new, and as our invention-- 1. Theloocly of cose A and cap B to inclose the mechanism of the steam safety-volvo; in combination with the steam chambers A andA. with openings u', bottom flange, and guard below, with openings a, in the manner and for thepurposes set forth.

2. The arrangement oflevers C, graduating arms D, steel lpoints d, standards E, weight F, Screw-lugs G, :ind saddles l, when constructed to operate with each other in the manner and for thepurposes set forth.

3. The arrangement of the steam chambers A and A" and openings a and a, as shown, in the manner and for the purposes set forth.

4f. The ring projecting from the bottom face of flange, provided with openings a; as shown in fig. 5, as set forth.

5. The arrangement of the horizontal eccentric spindle with reference to the xecl collar 7a on valve-stem,

its eet forth. Y DANlEL G. COPPIN,

GILBERT H. CLEMENS.

Witnesses 

